Gabor
alpha Sharpness (Gabor function major axis)
beta Sharpness (Gabor function minor axis)
gamma Sharpness of Gabor filter (major axis)
eta Sharpness of Gabor filter (minor axis)
theta Orientation angle of Gabor filter
s(x,y) 2-d signal
phi Gabor filter pharse filter
psi(x, y) 2-d Gabor filter in spatial domain
psi(x, y;f, theta) 2-d Gabor filter in spatial domain
psi_kl(t) Gabor function in Gabor expansion
delta uncertainty
psi(u, v) 2-d Gabor filter in frequency domain
a_kl expansion coeffient in Gabor expansion
f Frequency (Gabor filter frequency)
f0 Frequency of Gabor function
r_s(x,y;f,theta) Response of 2-d Gabor filter
t0 Location of Gabor function

